<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2011 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel5
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    1.7.6, 2011-02-27
 */


/**
 * PHPExcel_Writer_Excel5_Font
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel5
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel5_Font
{
    /**
     * BIFF version
     *
     * @var int
     */
    private $_BIFFVersion;

    /**
     * Color index
     *
     * @var int
     */
    private $_colorIndex;

    /**
     * Font
     *
     * @var PHPExcel_Style_Font
     */
    private $_font;

    /**
     * Constructor
     *
     * @param PHPExcel_Style_Font $font
     */
    public function __construct(PHPExcel_Style_Font $font = null)
    {
        $this->_BIFFVersion = 0x0600;
        $this->_colorIndex = 0x7FFF;
        $this->_font = $font;
    }

    /**
     * Set the color index
     *
     * @param int $colorIndex
     */
    public function setColorIndex($colorIndex)
    {
        $this->_colorIndex = $colorIndex;
    }

    /**
     * Get font record data
     *
     * @return string
     */
    public function writeFont()
    {
        $font_outline = 0;
        $font_shadow = 0;

        $icv = $this->_colorIndex; // Index to color palette
        if ($this->_font->getSuperScript()) {
            $sss = 1;
        } else if ($this->_font->getSubScript()) {
            $sss = 2;
        } else {
            $sss = 0;
        }
        $bFamily = 0; // Font family
        $bCharSet = PHPExcel_Shared_Font::getCharsetFromFontName($this->_font->getName()); // Character set

        $record = 0x31; // Record identifier
        $reserved = 0x00; // Reserved
        $grbit = 0x00; // Font attributes
        if ($this->_font->getItalic()) {
            $grbit |= 0x02;
        }
        if ($this->_font->getStrikethrough()) {
            $grbit |= 0x08;
        }
        if ($font_outline) {
            $grbit |= 0x10;
        }
        if ($font_shadow) {
            $grbit |= 0x20;
        }

        if ($this->_BIFFVersion == 0x0500) {
            $data = pack("vvvvvCCCCC",
                $this->_font->getSize() * 20,
                $grbit,
                $icv,
                $this->_mapBold($this->_font->getBold()),
                $sss,
                $this->_mapUnderline($this->_font->getUnderline()),
                $bFamily,
                $bCharSet,
                $reserved,
                strlen($this->_font->getName())
            );
            $data .= $this->_font->getName();
        } elseif ($this->_BIFFVersion == 0x0600) {
            $data = pack("vvvvvCCCC",
                $this->_font->getSize() * 20,
                $grbit,
                $icv,
                $this->_mapBold($this->_font->getBold()),
                $sss,
                $this->_mapUnderline($this->_font->getUnderline()),
                $bFamily,
                $bCharSet,
                $reserved
            );
            $data .= PHPExcel_Shared_String::UTF8toBIFF8UnicodeShort($this->_font->getName());
        }

        $length = strlen($data);
        $header = pack("vv", $record, $length);

        return($header . $data);
    }

    /**
     * Set BIFF version
     *
     * @param int $BIFFVersion
     */
    public function setBIFFVersion($BIFFVersion)
    {
        $this->_BIFFVersion = $BIFFVersion;
    }

    /**
     * Map to BIFF5-BIFF8 codes for bold
     *
     * @param boolean $bold
     * @return int
     */
    private function _mapBold($bold) {
        if ($bold) {
            return 0x2BC;
        }
        return 0x190;
    }

    /**
     * Map underline
     *
     * @param string
     * @return int
     */
    private function _mapUnderline($underline) {
        switch ($underline) {
            case PHPExcel_Style_Font::UNDERLINE_NONE:                return 0x00;
            case PHPExcel_Style_Font::UNDERLINE_SINGLE:                return 0x01;
            case PHPExcel_Style_Font::UNDERLINE_DOUBLE:                return 0x02;
            case PHPExcel_Style_Font::UNDERLINE_SINGLEACCOUNTING:    return 0x21;
            case PHPExcel_Style_Font::UNDERLINE_DOUBLEACCOUNTING:    return 0x22;
            default:                                                return 0x00;
        }
    }

}
